Question

Rama made an electromagnet and performed an experiment with it. The results of the experiment are shown in the table below.

Number of Coils Around the Iron Nail	Number of Paper Clips Attracted
10	5
20	8
30	11

From this Rama can conclude that
(a) increasing the number of coils increases the strength of the electromagnet.
(b) increasing the number of coils decreases the strength of the electromagnet.
(c) decreasing the number of coils increases the strength of the electromagnet.
(d) decreasing the number of coils does not affect the strength of the electromagnet.

Answer 1

(a) increasing the number of coils increases the strength of the electromagnet
From the table, it is observed that if the number of coils increases, the strength of the electromagnet increases in a way that it attracts more number of paper clips.